Pockethernet 2 – Preview Version (cable tester analyzer, RJ45 4channel TDR 249€)
pockethernet.com
pockethernet.com
AFAIR it uses Marvell PHY (..Alaska 88E1111 - https://pbs.twimg.com/media/D-hwZ5mXkAIBAdv?format=jpg&name=... )
- similar to https://www.youtube.com/watch?v=sfz1tJIX-XA
- but more like that (v1): https://www.youtube.com/watch?v=p0BLqzWLXoY&t=1726s .
(for 1 channel coax TDR you could use nanoVNA https://www.youtube.com/watch?v=BrfAv6bXYkA
or.. DIY https://entertaininghacks.wordpress.com/2015/07/27/poor-mans... ,
https://www.eevblog.com/forum/projects/my-time-domain-reflec... )